Found a bug, nothing big though. Go to the trophy room before you have any joker cards, look through them (I was on 3). Exit the trophy room and go buy something at the bat computer. Joker card still shows. Exit the computer and go back into it and the joker card is gone. Probably just forgot to clear the display when you exit joker cards so it may/may not work if you have more than 0.

I've been playing this since yesterday on the PSP, and I gotta say I like it way more than Lego Star Wars and Lego Indiana Jones(which I didn't really like). This is the best made Lego game yet in my opinion. Hope the DS version is as good as the PSP version.